Winding drum



UNITED STATES HARRY' S. MYERS, 0F VAN, PENNSYLVANIA.

WINDING :more

Specification of Letters Patent.

Patented Mar. 28, 1922.

Application led January 31, 1922. Serial No. 532,992.

To ZZ ywhom t may cof/warn: Be it known that I, HARRY S. MYERS, a

" citizen of the United States, residing at of which the following is aspecification.

This invention relates to winding drums, and more particularly to a novel construction of drum and mounting in which the drum is composed of a number of parts sol chosen as to roduce maximum strength in the assembledpstructure and a maximum of winding capacity with a minimum of width.

The particular adaptation selected for the purpose of illustratioii"`is"a drum designed for use in hoisting machinery', in which ce1'- tain of the parts are placed under heavy strain and in which there is a demand for maximum winding capacity for a given available width of space to be occupied by the drum and its wound cable.

The object of the invention is the production of a light construction of drum which will have great strength and winding capacity. Another object is the production of a drum which will have maximum width for a given width of space to be occupied by the hoisting machinery.

Another object of the invention is the production of a' drum in which the strains will be distributed and in which the parts are `so formed as to receive heavy strains X without danger of in]ury to the d rum parts or their relative displacement. A-Y'fnrther object is the production of a ,drum of parts which when assembled will act to Ysecurely hold the drum intact and the parts from relative displacement. A still further object is the provision of novel means for holding the drum parts when assembled against sliding movement upon-the shaft upon which it is mounted. A still further object is the provision of a mounting for the shaft and drum, which will maintainthem imperfect alignment with the other elements of the hoisting machine.

Another object of the invention is the mounting of the drum drive gear and the brake track upon the drum ends, and a. still further object is the provision of novel means for mounting the drive gear upon the drum end.

Other objects and advantages of the invention will hereinafter appear in the following description and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a lon itudinal sectional View through the drum ut showing the drum shaft in full, y

Figure2 is a sectional view taken upon the line 2-#2 of' Figure 1, and

Figure 3 is a perspective of one of the bearing elements used in the drum mounting.

Like reference characters indicate like parts throughout the figures ofthe drawings.

It will be understood that the invention may be varied in its details. of construction and that the s ecific embodiment illustrated and described erein is only indicative thereof; the specific embodiment, however, is one which has been found to be practical in its construction and operation.

The drum consists essentially of a shaft 10 upon which are kindividually keyed two stepped hubs 11, 11, supporting a drum cylinder 12. Secured to the outer faces of the hubs are end disks 13 and 14, to which are respectively attached the drum gear 15 and brake track 16. The shaft is mounted in bearings 17, 17, fitting closely the disks 13 and 14, and these bearings are carried by the framework of the hoisting machinery. These parts will be specifically described and their individual functions pointed out, after which a recital of their conjoint operation will be given.

The shaft 10 is of a length equal to the maximum width of space which could be r.allowed in a hoistingr machine combination of elements to the drum and its necessary 'parts It is mounted in the bearings 17, 17,

and its ends are flush with the ends of the bearings. In the shaft 1() two key grooves 18, 18. are cut, and in the bore of the hubs 11., similar and correspondingly located grooves are provided. Keys 19, 19, securely hold tlieghubs against rotation upon the shaft. i n

rlhe hubs are stepped and at 20 are machined to provide a support for the ends of the drum lcylinder 12, these parts being held together b vi'driving fit. Upon the shaft l() and between the bearings ITand hubs 11 are the end disks 13 and 14 of the drum, securely held against the Aextended outer faces of the hubs by the rods 22 passing through both disks and bothihubs and provided with nuts upon their projecting ends. It will be noted that the disks lie against the ends of the keys 19 and thereby c onointly hold the hubs against any ,sliding movement upon the shaft 10. It will also be noted that the disks have their outer faces Substantially abutting the inner ends of the bearings 17, and thereby hold thev shaft from any sliding movement within the bearings.

The gear 15 is formed with an attaching web 23 of irregular shape, as'shown by the dotted lines in Figure 2, which is secured to the disk 13 by bolts 24. The web 23 defines. a projecting portion 25, which in the rotation of the drum just clears the supporting framework 26 of the hoist. It also defines a shoulder 27 of a Width equal to the thickness of the disk 13. This diski fits within the gear 15 with its circumference frictionally engaging the shoulder 27.

It Will be seen that the long bearing of the hub 11 upon the shaft 1() insures true vertical ositioning of the disk 13, which is held in c ose contact with the extended outer face of the hub. The drumy cylinder in driving it with the steps ot the hubs and held to the hubs by the connecting rods -22 .causes these hubsto support each other in a true vertical position and enables it to be located in a position tojust clear the parts of the frame work of the hoist, of which it is av part.

The disk 14 is, in a like manner, secured to its hub, but is larger than the disk 13. It has securely attachedto its outer face by bolts 28a brake track or drum 16, consisting otl an attaching web 29, a band track 30 and a flange 31. The Hange and the outer edge of the disk constitute holding means for the brake band, which acts in conjunction with the band track to form the rotating 'portion of a brake. "-1

It will be seen that, ina manner similar to that described in connection with the disk 13 and its associated parts, the disk 14 and brake track are held in a true right angular position with respect to the shaft 10' and. with the outer edge of the flange 3l just clearing the parts of the hoist tramework.

23 and the gear portion 25, for a purpose hereinbefore set forth.l The numeral 35 with the gear and the bolts 24. The liability of shearing the bolts 24 is reduced to a minimum by this mounting of the gear upon the disk and advantage taken of the full available width of the drum end for the gear. The strain upon the disk 13 is taken by lthe hub 11 and transmitted to the shaft 10 through the key connection 'between the shaft and hub.` From the shaft 1() it is transmitted to the hub upon the opposite side of the drumand hence to the disk 14 and its associated parts. It is to be noted that no torsional strain is placed upon the drum cylinder or the rods 22, these parts servin only to hold the disks and their associate elements together and in true angular position with relation to the shaft 10,v necessary to a smooth and eliicient operation of a hoist.

It will be appreciated that the construcy tion of drum shown and described causes the power strain to be placed upon the parts' best able to carry them, and that it secures a maximum width of cable winding space to a given efective width of framework. It securesl in a marked degree the advantages and accomplishes the objects set forth in this specification as well as others ancillary thereto.

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a hoist machine, a trame having aligned bearings, a shaft in said bearings, and a drum rigidly secured to said shaft and having its ends held in position by seid bearings. said ends having outwardly projecting circumferential portions forming, res iectively, a drive gear and a brake track and projecting over said bearings.

2. An end ot a hoist drum comprising if stepped hub, a disk secured to the hub, and a gear attached to said disk, the disk lying within a shouldered portion of said gear with its face in a common plane with the edge o't' the gear and the Jace of said hub.

3.`An end of a hoist drum comprising a skeleton gear having'an attaching web delining a circular angled recess with the gear body. a disk attached to said web and trictionally held within the recess of said gear, and a stepped hub secured to said disk, the contacting 'faces of said disk and hub lying in a plane with the edge of the gear.

l. winding drum comprising a shaft, hubs keyed 'to said shaft, a drum cylinder rigidly supported by said hubs, and end disks secured to said hubs and abutting the ends ot the keys, whereby the drum is held against rotation and against sliding movement upon said shaft.

5. EL winding drum comprising' a, shaft, stepped hubs secured to said shait by keys, a drum cylinder rigidly Supported upon said hubs by a driving lit with 'the step thereof, disk ends 'for said drum abutting the keys of said shaft to prevent sliding movement between the drum-and shaft, and means for clamping the disks, hubs and cylinder together.

6. A winding; drum comprising a shaft provided with a pair of key grooves, stepped hubs on said shat't having corresponding key zgrooves throughout their length, keys in said grooves, end disks secured to said hubs and abutting,- the ends ot said keys, a drum Cylinder supported by said hubs7 and means for damping the hubs, disks and cyl* inder together.

7. In a hoist machine, a trame carrying` aligned bearin s, a shaft in said bearings, a drum secure( to the shaft and comprising a cylindrical drum body and end members havinginwardly projecting hubs supporting said body and outwardly projecting' circumferential portions forming, respectively, a drive gear and a brake track, said bearings abutting the faces ol said end members to maintain the drum spaced in said frame,

8. In a hoist drum and mounting, spaced frame members carrying aligned bearings, a drum shaft mounted in said bearings, and a drum rigidly secured to said shaft comprisingend members having inwardly projecting hubs and outwardly projecting circumterential flange portions, a tubular drum body on said hubs and means 'tor securing; said drum elements to each other, one ot said flanged portions being' pro fided with teeth to form a drive gear 'for said drum and the other ot said flange portions constituting a brake track, and the bearings on said frame members being` extended into the cupped drum ends defined by said flanged portions to maintain said drum spaced between said vtrarne members.

9. A hoist drum comprising end members havinginwardly projecting hubs toi-ming extended shaft engaging elements and having outfvardly }Y rojecting circum'tercntial portions constituting, respectively, drive and brake elements, shoulders on said end members, a tubular drum body supported by said shoulders, means for securely holdingl said end members and tubular body together, a shaft mounted in said hubs, and means for securely holding said shaft against movement in said hubs.

in testimony whereo't l ailix my signature.

HARR Y M Y ERS. 

